Meghan is interested in finding the area under the curve (between the curve and the x-axis) of f(x) = (1/5)x^5 - 31x^3 - 26x^2 + 1440x, shaded between x = 2 and x = 6. Meghan decides to estimate the area between x = 2 and x = 6 with 4 rectangles having their TOP RIGHT CORNERS touching the curve. She spaces the rectangles evenly such that each rectangle has a base of 1 unit. She determines the heights to be: f(3) = 3297.6, f(4) = 3564.8, f(5) = 3300, and f(6) = 2563.2. Using these dimensions, R4 will be ... 12696.8 12725.6 12870.4 12950.2